9802981 has 2 divisors, whose sum is σ = 9802982. Its totient is φ = 9802980.

The previous prime is 9802979. The next prime is 9802987. The reversal of 9802981 is 1892089.

9802981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8820900 + 982081 = 2970^2 + 991^2 .

It is an emirp because it is prime and its reverse (1892089) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9802981 - 2¹ = 9802979 is a prime.

It is a super-2 number, since 2×9802981² = 192196872972722, which contains 22 as substring.

Together with 9802979, it forms a pair of twin primes.

9802981 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9802981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9802987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4901490 + 4901491.

It is an arithmetic number, because the mean of its divisors is an integer number (4901491).

Almost surely, 2^9802981 is an apocalyptic number.

It is an amenable number.

9802981 is a deficient number, since it is larger than the sum of its proper divisors (1).

9802981 is an equidigital number, since it uses as much as digits as its factorization.

9802981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 9802981 is about 3130.9712550581. The cubic root of 9802981 is about 214.0191920948.

The spelling of 9802981 in words is "nine million, eight hundred two thousand, nine hundred eighty-one".